AK+Kernel+LibSanitizer: Implement __ubsan_handle_function_type_mismatch

Author: https://github.com/implicitfield
Commit: 1159cd9390
Pull-request: https://github.com/SerenityOS/serenity/pull/23960
Reviewed-by: https://github.com/ADKaster ✅
Reviewed-by: https://github.com/DanShaders
Reviewed-by: https://github.com/alimpfard

AK/UBSanitizer.h

@@ -148,6 +148,11 @@ struct PointerOverflowData {
     SourceLocation location;
 };
 
+struct FunctionTypeMismatchData {
+    SourceLocation location;
+    TypeDescriptor const& type;
+};
+
 struct FloatCastOverflowData {
     SourceLocation location;
     TypeDescriptor const& from_type;

Kernel/Prekernel/UBSanitizer.cpp

@@ -141,4 +141,10 @@ void __ubsan_handle_pointer_overflow(PointerOverflowData const& data, ValueHandl
 {
     print_location(data.location);
 }
+
+void __ubsan_handle_function_type_mismatch(FunctionTypeMismatchData const&, ValueHandle) __attribute__((used));
+void __ubsan_handle_function_type_mismatch(FunctionTypeMismatchData const& data, ValueHandle)
+{
+    print_location(data.location);
+}
 }

Kernel/Security/UBSanitizer.cpp

@@ -208,4 +208,11 @@ void __ubsan_handle_pointer_overflow(PointerOverflowData const& data, ValueHandl
         critical_dmesgln("KUBSAN: addition of unsigned offset to {:p} overflowed to {:p}", base, result);
     print_location(data.location);
 }
+
+void __ubsan_handle_function_type_mismatch(FunctionTypeMismatchData const&) __attribute__((used));
+void __ubsan_handle_function_type_mismatch(FunctionTypeMismatchData const& data)
+{
+    critical_dmesgln("KUBSAN: call to function through pointer to incorrect function type {}", data.type.name());
+    print_location(data.location);
+}
 }

Userland/Libraries/LibSanitizer/UBSanitizer.cpp

@@ -482,4 +482,23 @@ static void handle_float_cast_overflow(FloatCastOverflowData& data, ValueHandle)
     handle_float_cast_overflow(data, value);
     ABORT_ALWAYS();
 }
+
+static void handle_function_type_mismatch(FunctionTypeMismatchData& data, ValueHandle)
+{
+    auto location = data.location.permanently_clear();
+    if (!location.needs_logging())
+        return;
+    WARNLN_AND_DBGLN("UBSAN: call to function through pointer to incorrect function type {}", data.type.name());
+    print_location(location);
+}
+[[gnu::used]] void __ubsan_handle_function_type_mismatch(FunctionTypeMismatchData& data, ValueHandle value)
+{
+    handle_function_type_mismatch(data, value);
+    ABORT_IF_DEADLY();
+}
+[[gnu::used, noreturn]] void __ubsan_handle_function_type_mismatch_abort(FunctionTypeMismatchData& data, ValueHandle value)
+{
+    handle_function_type_mismatch(data, value);
+    ABORT_ALWAYS();
+}
 } // extern "C"